The phrase "feature: zhenya.efimov" likely refers to the work of (Женя Ефимова), a Russian indie-pop musician known for her soulful and intimate songwriting.
: A track featuring Zhenya Efimova and Anya from Piter . zhenya.efimov
If you are looking for tracks where she is a featured artist or has collaborated, here are some notable examples: The phrase "feature: zhenya